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20 POINTS FOR THIS!!!!!!!!!!!!!!!!!!!!!!!!
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5 votes
20 POINTS FOR THIS!!!!!!!!!!!!!!!!!!!!!!!!

20 POINTS FOR THIS!!!!!!!!!!!!!!!!!!!!!!!!-example-1
User Taufiq Rahman
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2 Answers

6 votes
b=13 add 7 to both numbers then divide by 5
User MotoxX
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3.5k points
2 votes

Answer:

b = 13

Explanation:

the value of the discount is a constant, while the total cost of the books is a variable because it depends of the purchase

We can write this equation

5b - 7 = 58

Solve it

1) add 7 at both members

5b -7 + 7 = 58 + 7

5b = 65

2) divide both membera by 5

b = 13

User Peter Torr
by
3.2k points
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